Denver-based bitcoin remittance startup bridge21 announced that it has added 38 new banks to its partner bank roster to enable more U.S.-based individuals to make international money transfers from the U.S. to Mexico.bridge21’s new banking partners include Bank of America, Citibank, Chase, Fidelity, SunTrust Bank, TD Bank and Wells Fargo, among others. The new additions increased the startup’s partner bank network to 58 banks and credit unions in the U.S.To provide its low-cost cross-border payment service, bridge21 leverages bitcoin to process the money transfers, while its customers deal purely in fiat currency. …